• MURI, overburden, can result from Mura, and
from removing too much Muda (waste) from the
• When operators or machines are utilized for more
than 100% to finish their task, they are
• This means breakdowns when it comes to
machines and absenteeism when it comes to
• To optimize the use of machines and make sure
they function properly, preventative- and
autonomous maintenance can be implemented.
• To prevent overworked employees, safety should
be the focus of all process designs and all
standard work initiatives.
Types of Muri
People Related Muri
• Using standard work
• Using 6S
• Using Jidoka Principles
Machines Related Muri
• Preventive Maintenance
• Autonomous Maintenance
• Standardization or standardisation
is the process of implementing and
developing technical standards.
Standardization can help to
repeatability, or quality. It can also
facilitate commoditization of
formerly custom processes.
Machine related Muri
• Preventative maintenance is
maintenance that is regularly
performed on a piece of
equipment to lessen the
likelihood of it failing.
• It is performed while the
equipment is still working, so
that it does not break down
• Autonomous maintenance is
carried out by the operators of the
machines rather than by dedicated
• Autonomous maintenance has the
operators performing the simpler
maintenance routines such as
lubrication, bolt tightening, cleaning
and also inspection and monitoring.
MURA IN WORK
• Rushing type production model (evening production model, week-end
production model, month-end production model)
To eliminate production variation for weekly, daily or
hourly production quantity.
• Allocation of manpower (capability) and the work involved (load) are not
• Unbalanced production capability among different processes.
• Making too many in one go
To produce necessary quantity of necessary items at
necessary timing only.
• Working is not rhythmical.
ECONOMIC COST OF WASTE
Every business activity absorbs resources and
every resource has a cost
Every waste has a cost, and that is direct loss to
Economic value of waste in a process industry
are in the range of 10 -35% of annual turnover
7 FORMS OF MUDA
Waiting for work and materials
Inventories/ Unnecessary W-I-P
MUDA of Motion
Movement that does not add value
• Searching for files
• Extra clicks or key strokes
• Clearing away files on the desk
• Gathering information
• Looking through manuals and
• Handling paperwork
MUDA of Waiting
Idle time created when material, information, people or
equipment is not ready.
• The system to come back
• Copier machine
• Customer response
• A handed off file to come back
MUDA of Transport
Movement of information that does not add value:
• Carrying documents to and fro from shared
• Taking files to another person
• Going to get signatures
MUDA of Over
Generating more information than the customer needs right
• More information than the customer needs
• Creating reports no one reads
• Making extra copies
• More information than the next process needs
MUDA of Process
1. Using more expensive
equipment or tools where
simpler ones would suffice.
2. Having meetings that are not
3. Having people at meetings
that are not required.
4. Agenda points, not to be
Efforts that create no value from the customer
• Creating reports
• Repeated manual entry of data
• Excessive paperwork
• Duplicity of work
• Use of outdated standard forms
• Use of inappropriate software
More information, project, material on hand than the
customer needs right now:
• Files waiting to be worked on
• Open projects
• Office supplies
• E-mails waiting to be read
• Unused records in the database
Work that contains errors, rework, mistakes or
lacks something necessary:
• Data entry error
• Pricing error
• Missing information
• Missed specifications
• Lost records
• Rescheduling meetings
Find the Root Cause
- Asking ‘WHY’ for 5 times
- 5W 1H
How to eliminate muda??
The Five Ws and The One H
Who What Where
1. Who does it?
2. Who is doing it?
3. Who should be doing it?
4. Who else can do it?
5. Who else should do it?
6. Who is doing 3-Mus?
1. What to do?
2. What is being done?
3. What should be done?
4. What else can be done?
5. What else should be done?
6. What 3-MUs are being
1. Where to do it?
2. Where is it done?
3. Where should it be done?
4. Where else can it be done?
5. Where else should it be
6. Where are 3- MU s being
5 W 1 H of MUDA